1 Which of the following is NOT a part of the human digestive system? A Stomach B Small intestine C Lungs D Liver
2 Which of the following is a significant role of mitosis in multicellular organisms? A Production of gametes B Genetic diversity C Growth and repair of tissues D Reduction of chromosome number
3 Which of the following occurs during anaphase of mitosis? A Chromosomes align at the metaphase plate B Nuclear envelope reforms C Sister chromatids are pulled to opposite poles D Chromosomes condense and become visible
4 Which of the following lists the levels of organization in the human body from simplest to most complex? A Cell, tissue, organ, organ system, organism B Tissue, cell, organ, organism, organ system C Organ, tissue, cell, organ system, organism D Cell, organ, tissue, organism, organ system
5 Which of the following is an organ found in the shoot system of a plant? A Root B Leaf C Root hair D Root cap
6 Which of the following is a function of the skeletal system? A To produce insulin B To exchange gases C To support the body and protect organs D To filter blood
7 The main function of the root system in plants is to: A Produce flowers B Absorb water and minerals and anchor the plant C Perform photosynthesis D Transport sugars
10 Which of the following best describes a tissue? A A group of similar cells that work together to perform a specific function B A structure made of different tissues that work together C The basic unit of life D A group of organs that work together
12 Which type of fatty acid has no double bonds between carbon atoms? A Saturated B Unsaturated C Monounsaturated D Polyunsaturated
13 In which stage of mitosis do chromosomes align at the metaphase plate? A Prophase B Metaphase C Anaphase D Telophase
14 During which process is mRNA used to make a protein? A Replication B Transcription C Translation D Mutation
15 Which type of tissue covers the outer surface of the body and lines internal organs? A Connective tissue B Muscle tissue C Epithelial tissue D Nervous tissue
16 Which biomolecule is the main component of the cell membrane? A Carbohydrates B Proteins C Lipids D Nucleic acids
17 Which of the following is a structural polysaccharide found in the exoskeleton of insects? A Starch B Glycogen C Cellulose D Chitin
18 What structure forms during cytokinesis in animal cells? A Cell plate B Cleavage furrow C Phragmoplast D Spindle fiber
19 Which scientists proposed the double-helix model of DNA? A Mendel and Morgan B Watson and Crick C Darwin and Wallace D Pasteur and Koch
22 What is the significance of meiosis? A It produces genetically identical cells B It maintains chromosome number across generations C It causes growth and repair D It results in diploid daughter cells
23 Which of the following is a storage polysaccharide in plants? A Glycogen B Cellulose C Starch D Chitin
25 What is the building block of nucleic acids? A Amino acid B Nucleotide C Monosaccharide D Fatty acid